Preparation method of graphene/ferro-tin alloy composite anode material for lithium ion battery

The invention belongs to the field of preparation of a composite material, and relates to a preparation method of a graphene/ferro-tin alloy composite anode material for a lithium ion battery. The preparation method comprises the main steps of: using natural flake graphite as a raw material, after obtaining graphite oxide, carrying out ultrasonic dispersion on the graphite oxide in water and alcohol mixed solution, then adding SnC14.5H2O and K3[Fe(CN)6] solution, and performing a hydrothermal reaction for 24 h at a temperature of 80 to 150 DEG C; and after cooling, collecting precipitates, and washing and drying the precipitates to obtain a graphene oxide/Sn3[Fe(CN)6]4 precursor, then calcining the precursor in an inert atmosphere to obtain the graphene/ferro-tin alloy nano composite material (FeSn2@Sn/rGO). FeSn2@Sn nano particles in the graphene/ferro-tin alloy composite anode material disclosed by the invention are tightly attached to the surface of graphene, and are uniformly dispersed; and when the graphene/ferro-tin alloy composite anode material is used as a lithium ion battery anode material, under a current density of 200mA g-1, first discharge specific capacity reaches 1,598 mAh g-1, and after circulation is carried out for 60 times, the capacity reaches 970 mA h g-1. The preparation method disclosed by the invention is simple and easy to operate in operation process, short in reaction time and easy for industrial implementation.